42 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



ORTALIS VETULA DESCHAUENSEEI Bond 



Utila Chachalaca 



Adult male (unique specimen). — Similar to Ortalis vetula vetiila but 

 larger ; the tips of the outer rectrices ochraceous-drab instead of white ; 

 the feathers of the upper throat decidedly blacker ; the lower throat grayer ; 

 hindneck grayish merging imperceptibly with the dark gray of the crown 

 and occiput; wing 208; tail 225 ; exposed culmen 25.5 ; tarsus 58; middle 

 toe without claw 45 mm. 



Known only from the type locality — Utila Island, Spanish Honduras.''-' 



Ortalis vetula deschanenseei Bond, Proc. Acad. Nat. Sci. Philadelphia, Ixxxviii, 

 1936, 356 (Utila Island, Spanish Honduras; descr. ; meas. ; crit.). — Hellmayk 

 and CoNOVER, Cat. Birds Amer., i, No. 1, 1942, 173 (syn. ; distr.). 



ORTALIS GARRULA CINEREICEPS (Gray) 



Dusky-headed Chachalaca 



Adult (sexes alike). — Forehead, crown, occiput, nape, hindneck, feath- 

 ered parts of sides of head, chin, and upper throat deep mouse gray to 

 dark mouse gray ; interscapulars, scapulars, back, rump, upper wing and 

 tail coverts, and inner secondaries raw umber with a slight olivaceous 

 wash (in fresh plumage almost medal bronze) ; primaries hazel, the inner 

 ones vaguely washed with olive-brown at the tips ; outer secondaries 

 olivaceous raw umber with a fairly broad median shaft line of hazel 

 (except terminally) widening across the inner webs for their basal two- 

 thirds ; the upper surface of the wings with a faint oily green sheen not 

 present on the back or interscapulars ; rectrices olivaceous-black with a 

 strong dark-green sheen, the middle pair paling to grayish medal bronze 

 terminally, the other pairs broadly tipped (20-35 mm.) with pale grayish 

 fulvescent, fading to almost white at the tips; lower throat and breast 

 light brownish olive with a varying degree of isabelline wash ; abdomen 

 pale fulvescent, washed with isabelline anteriorly and on thighs, sides, 

 and flanks, the thighs with a grayish tone; under tail coverts grayish 

 buffy brown ; under wing coverts hazel ; iris burnt umber to sepia ; bill 

 pale bluish horn, darker and more plumbeous on basal half, including cere ; 

 bare skin of face and throat reddish ; naked lores and orbits dull slate 

 color ; tarsi and toes slate color, claws horn color. 



Juvenal (only one chick in early postnatal molt seen). — Upper wing 

 coverts and remiges dull bister to dark sepia edged and tipped with bright 

 ochraceous-buff. (Rest of specimen still in downy plumage.) 



Downy young. — Forehead, crown, occiput, cheeks, auriculars, and 

 malar area fuscous-black, a little dark chestnut mixed with the black on 

 the middle of the crown; hindneck and middle of back posterior to the 



" Additional material of this form is much to be desired, but the unique type is 

 remarkably distinct from its mainland neighbor O. v. plumbiceps and, as indicated 

 above, from the nominate race as well. 



